James reynolds



J. REYNOLDS.

Soft Rubber Apparatus.

No. 15,087 V Patented June I0, 1856.

UNITED STATES A- N v.

JAMES REYNOLDS, OF NEW YORK; N. Y.

FEED APPARATUS FOR WORKING GUTTA-PERGHA.

Specification of Letters Patent No. 15,087, dated June 10, 1856.

To all whom it may concern:

Be it known that I, JAMES REYNOLDS, of the city, county, and State ofNew York, have invented a new and useful Forcing Apparatus for Forcingor Pressing Gutta- Percha into Dies or Molds; and I do hereby declarethat the following is a full, clear, and exact description of the same,reference being had to the accompanying drawings, forming part of thisspecification, in which- Figures 1 and 2, are vertical sections at rightangles to each other of my forcing apparatus.

Similar letters of reference indicate corresponding parts in bothfigures.

This invention is principally intended to be employed in the manufactureof gutta percha rope and tubing and in covering wire, in whichmanufactures it is extremely desirable to have a continuous forcingoperation to drive the material through the die. The most convenient andit may be said the only practicable way of producing a perfectlycontinuous and uniform forcing action is by means of a rotary forcingapparatus. Attempts have been previously made to construct a rotaryapparatus for this purpose but owing to the peculiar character of thematerial and its liability to clog the apparatus these attempts havebeen hitherto unsuccessful.

This invention consists in a rotary apparatus of peculiar constructionwhich, operates with the greatest success.

To enable others to make and use my invention, I will proceed todescribe its construction and operation.

A, is a box of cast iron or other strong material whose horizontalsection is of quad 'rangular form, open at the top and closed at thebottom but having two holes a, a, on opposite sides near the bottom toreceive the dies for forming the interior and exterior of tubing. On oneside of the upper part, is a concave Z), I) see Fig. 1, of the form ofan arc of a cylinder described from a horizon tal axis.

B, is a shaft to which is attached a hollow cylindrical head C, O. Thisshaft and head are fitted to work in bearings in opposite ends of thebox as shown in Fig. 2, said bearings being concentric to the axis fromwhich the are I), b, is described. The exterior of the cylindrical headis of such diameter as to work in contact or nearly so with the side 0,of the box opposite to the concave b, b,

which leaves a considerable space between it and the concave a, a. Thecylindrical head C, G, contains a number of radial slots of the wholelength of the box to receive a corresponding number of straight andparallel sided slides or, as they may be termed, slidv within thecylindrical head 0, C, and is firmly secured to one end of the box bymeans ofa screw on its end and a nut 9, outside the box. This shaft istruly cylindrical on the greater part of its circumference and of a sizeto fit easily to the interior of the cylindrical head C, C, which isbored truly to receive it but the remainder of its circumference is cutaway in such a way that it may allow the sliding pistons to move intothe cylindrical head as they are severally brought in contact with theside 0, of the box by the rotation of the shaft D, and cylindrical head,and that it may serve as a stationary cam to force out the slidingpistons again as they leave the side 0. The stationary shaft E, has asmall hole d, bored from the end which protrudes from the box nearly tothe other end, and to this hole several small passages e, e, communicatefrom the space f, which is left between the eccentric portion of thestationary shaft E, and the interior of the cylindrical head. The box A,is intended to be surmounted by an upright tube which is to be keptheated by a steam jacket and to contain a column of gutta percha in amelted or plastic state to keep the box A, constantly supplied.

The operation of the apparatus is as follows: Rotary motion being givento the shaft B, and cylindrical head C, C, in the direction of the arrowshown in Fig. l, the pistons are severally forced out as they approachtheir highest position and then descending in contact with the concaveforce down the material into the lower part of the box thereby producingthe necessary pressure to fill the dies; and they are driven in again asthey come in contact with the side 0, of the box. As far as theoperation is thus described, it does not differ from that of some rotaryforcing pumps but there are two important novel features in theapparatus in which .it differs from all other apparatus known to me, oneof which is that the cam for forcing out the pistons is entirely withinthe rotating head which carries them, which in connection with the otherfeature of difference which is of still more importance to the perfectoperation, prevents the clogging of the machine.

The other and more important feature of novelty consists in the passagese, 6, cl, by which any material leaking past the pistons into the spacef, is allowed to escape through the shaft E. lVithout this provision forescape or leakage the apparatus would be totally impracticable unlesspacked sliding pistons were employed as the gutta percha would get intoand fill the space f, and thus stop the operation of the pistons, andwith packed pistons the apparatus would operate very stifliy and requireenormous power to drive it. But by fitting the pistons easily andproviding for leakage in this way the gutta percha is made to serve aslubricating material to the pistons and enables the machine to workeasily, while the escape is quite inconsiderable and causes no waste asthe escaping material is all collected and Worked again. Thus theconstruction of the machine is reduced to the highest degree ofsimplicity and yet its operation-is perfect.

What I claim as my invention, and desire to secure by Letters Patent,is,

The combination of the rotary forcing apparatus, consisting of a cam E,for forcing out the sliding pistons 'D, D, arranged entirely within therotating head C, C, with a passage or passages within the rotating headwhich carries the said pistons, providing for leakage, substantially asand for the purposes herein described.

J AMES REYNOLDS.

Witnesses WVM. TUscH, JAMEs F. BUoKLnY.

